Supply system for boilers.



H. LBMP. SUPPLY SYSTEM FUR BOILERS. APPLICATION TIL-ED mu 1, 1902.

1,011,213. Patented Dec.12,1911.

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H. LEMP. SUPPLY SYSTEM FOR BOILERS.

APPLIOATIDH FILED MAY 7, 1802.

Patented Dec. 12, 1911.

3 SHEETS-*SKEET 2 In Qenbor;

Herman? Lamp, by v 4 H. LEMP. SUPPLY SYSTEM FOR BOILERS. APPLICATIONFILBQMAY 7, 1902,

1,011,213. Patented De0.12,1911.

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UNITED s'ra rns PATENT OFFICE.

HERMANN LEMP. OF LYNN. MASSACHUSETTS, ASSIGNOR, BY MESNE ASSIGNMENTS, TO

GENERAL ELECT HTC COMPANY,

A CORPORATION OF NEW YORK.

SUPIPLY SYSTEM FOR BOILERS.

ai ed I; To all whom it may concern;

Be it known that I, I'IERMANN LEMP, a citizen of the United States,residing at Lynn, in the county of Essex, State of Massachusetts, haveinvented certain new and useful Improvements in Sup ly Systems forBoilers, of which the following is a specification.

It is desirable for systems using flash boilers and hydrocarbon burnersto supply the water and fuel in proportionate amounts for ordinaryconditions of service, and to provide means whereby under abnormalconditions the supply of fuel can be automatically altered with respectto the water supply; in other words, there are times when the demand forfuel is relatively lesser or greater with respect to the water supplythan it is at other times. It is also desirable to provide amanually-actuated water pump whereby an initial pressure may be impartedto the water supplied to the flash boiler.

The present invention has for its object to provide a combined fuel andwater pump which is capable of supplying fuel to the burner and water tothe boiler in proportionate amounts for normal operation, and which isalso capable of automatically varying the relation between the amountsof fuel and water supplied to the burner and boiler respectively, tocompensate for the varying or abnormal conditions of service.

For a fuller description of what I consider to be novel and myinvention, attention is called to the accompanying description, and thedrawings.

Referring to the drawings, Figure 1 is a diagrammatic view of a flashboiler system operating with hydrocarbon fuel, which system is providedwith my improved pumps; Fig. 2 is aside elevation of the pumps, togetherwith the actuating device; Fig. 3 is a plan view thereof; Fig. 4 is anenlarged view of the pumps in side elevation; Fig. 5 is a longitudinalsection showing the power and manually-actuated water pumps; Fig. 6 is atransverse section taken on lines 6 (3 of Fig. 5; Fig. 7 is a sectionalview taken on line 7 7 of Fig. 4; Fig. 8 is a detail view of oneof thecheck valves; Fig. 9 is a detail plan view of one of the disks forregulating the movement of the ball valves; Fig. 10 is a slightmodification of the valve mechanism of Fig. 7 wherein two valves arearranged in series; and Fig. 11 is a partial Specification of Letter Taent. Patented Dec. 12, 1911.

1902. Serial No. 106,235.

5 sectional view of the rubber buffers and partitions on the eccentricrod forming part of the driving means for the pumps.

Referring to Fig. 1, 1 represents a flash boiler of any suitableconstruction, heated by the hydrocarbon burner 2, and supplying steam tothe engine 3. The burner and boiler are surrounded by a casing 4, whichmay be of any suitable construction. The top of the boiler is providedwith a cover 5 having a suitable chamber to receive the exhaust steam,which latter passes from the engine by the pipe 6. chamber and thearrangement of the passage for the exhaust steam is described in a priorapplication, SerialNo. 35,245, filed Nov. 2, 1900, and is therefore notclaimed herein. Water is supplied to the boiler from the tank 7, bymeans of two pumps 8 and 9. In practice, the pump 9 is mounted directlyunderneath the pump 8, but for the purpose of illustration it is shownas being detached. Mounted on the side of the casing of the water pumpis a fuel pump 10, which pump receives its supply of fuel from the tank11. A hand pump 12 is employed to supply the tank 11 with an initialpressure whlch is or may be sufficient to heat the boiler when themachine is not runnin etc. The fuel tank is connected with the uel pumpby the pipe 13, and the pump is connected with the burner by the pipe14. Between the pipes leading to and from the pump is a by-pass and avalve 15, which may be operated automatically or by hand, the object ofwhich is to supply fuel to the burner when the pump is not operating andto relieve the pressure on the burner at the time the system is shutdown, such, for example, as when the system is mounted on a vehicle andthe vehicle is brought to a standstill.

Under ordinary conditions of service the pressure on the tank' 11 mayrun from atmospheric pressure to say ten pounds per square inch, but thepressure of the fluid delivered to the burner is considerably higher,such for example, as from 40 to pounds. Itwould take considerable timefor the fuel pressure to decrease, and to obviate this the valve 15 islaced in. circuit as described. When the val ve is opened the Theconstruction of the pump is shunted and the pressure on the terval oftime until the pre sure on tho burner becomes substantially that of thetank. whereupon the flow i reversed and the tank supplies the burner soa:- to main tain the llame in a banked ct'uldition. 'l'he. ll \'-passvalve i lett open until the system is again started into operation whenthe valve is rlo ed so that the fuel discharged by the pump will pass tothe burner. The necessity of providing means to quickly relieve the.pressure on the burner when the system is shut down, is due to the fartthat the working pressure on the burner lags a certain time after theforced draft is stopped. As a result the natural draft does not supplysutlicient air to enable the fuel discharged by the burner to burncompletely and the flame is sooty and odorous.

The pumps are driven from the engine 3, either directly or indirectly.It is preferable, although not absolutely necessary, that the speed ofthe pumps bear a fixed relation to that of the engine. The water pump isprovided with a piston 16, which is 'co11- nected to a cross-head 17,and the latter is connected by side rods 18 with the crosshead 19.Between the cross-head 17 and a stationary abutment are extensionsprings 20, which tend at all times to return the pump piston to itsouter position. Between the cross-heads 19 and 21 is a compressionspring comprising a plurality of elastic buffers 22, which buffers areso arranged that when the pressure on the piston of the water pumpexceeds a certain amount, more or less of the stroke of the eccentric:23, driven by the engine shaft, is taken up thereby. Mounted on theright-hand end of each of the side rods 18 is a head 24, which isconnected by the pivot 26 to the rods 27, the latter being connected tothe crosshead 19. The object in providing the pivoted connections 26 isto permit the crossheads 19 and 21 and springs 22 to rise and fall underthe action of the eccentric 23. It is to be noted that the side rods 18have a reciprocatin motion and are held in suitable guides. :VIounted onan extension on one. of the pivots is a projection or fork 28,

which engages with a stop or head 29,

formed on the end of the oil pump piston. This fork is capable of movingindependently of the piston under certain conditions as will hereinafterappear. The head 29 is provided with a projection, and secure'i to thisprojection and to a stationary aLnt ment on the pump casing is anextension spring 30, which constitutes a motor and is employed toactuate the fuel pump. The fork 28 pulls the piston out of the cylinderas the eccentric 2 revolves, and the extent of this withdrav ragmovement is controlled by the movement of the water pump. or in otherwords by the pressure on the water 1 d of the flash boiler. The m tor orspring 510 performs the actual operation of pumping. and thespring is soadjusted that when the pressure on the burner, due to any cause. exceedsa predetermined amount. as for example when itexceedsthe amount theburner can handle etliciently. thed'uel pump pis ton is permitted toshorten its stroke without regard to the total movement. of the lurk'38: that is to say. it the pressure on lhe burner is at or near itsmaximum. the spring 30 will be distended, and the fork while it pullsthe piston out to the limit of its movement on each stroke, is free tomove toward the left independent thereof. By reason of the arrangementdescribed the supply'of fuel to the burner and water to the boiler isautomatically controlled by the spring-actuated water pump, yet anadditional compensating means is provided for the fuel pump whereby theressure may be maintained at a predetermined maximum, even thoughthepressure of the water system is below the normal. In practice Iprefer to setthe valves of the fuel pump and so proportion its pistonand stroke that it has a slight lead over the water pump.

The piston of the manually-actuated water pump 9 is moved in onedirection by the extension spring 35, and in the opposite direction bythe lever 36, which may be operated by hand or by the foot as isdesired. This pump is connected to the water tank by the pipes 37 and38, the latter also connecting it to the power pump, a suitablecheck-valve 39 being provided to revent the water from working back intot 1e su ply tank on the discharge stroke of tl fe piston. The power andmanually-actuated pumps both receive their supply from the same pipe,and certain of the valves are common to both. Vhen the pressure of thewater.supply exceeds a predetermined amount, the relief valve 40 willopen and discharge the surplus water, or water and steam as the case maybe, back into the tank 7.

Referring now to the detail construction of the pumps, Fig. 5. the waterpump comprises a casing 41, in which are mounted the manually-actuatedpiston 42, and the poweractuated piston 16. The casing is adapted to bebolted to a frame, tube, or support 43, in any suitable manner, and whenplaced in position on a carriage is preferably tilted downward in orderthat the head of each Referring to Fig. 2, when the pumps are mounted onthe vehicle the line 43 43 assumes a vertical position.

Each of the pistons is provided with a packing wherein 44-represents aflanged l sleeve having the cross-section of the cylindrical portiongradually decreasing in thickno toward the. end. as is indicated at 45.l The object in making this sleeve thin at the piston may be lower thanthe cross-head.

a relatively small shank or stem. No efi'ort is made to have the headmake a close fit with the valve seat, since it is not depended upon tocause the closing of the passage. For this latter, dependence is placedupon a 70, small, soft rubber ball above the stem 56. Then the pressureis in such a. direction that it tends to force the valve against itsseat, the ball is distorted somewhat so that it will make a close fitwith the tapered or conical 75 valve seat 55. As soon as the pressure isrelieved, the rubber, owing to its resiliency, will again assume itsspherical form, and being very light is easily lifted due to thedelivery stroke of the pump piston 42, or so the suction stroke of thepower pump piston 16. 1 have tried using a soft rubber ball without thesupport, but find that there is a tendency at high pressures for theball to be forced into the passage beyond the seat, resulting in anlIIJUIlOUS chafing of the rubber. T e support 56 bein relativelyincompressible obviates this di culty as it pre vents the ball frombeing unduly distorted, and the wall forming the seat does not 90 chafeit. The stem of the support serves to prevent the ball from moving fromits proper position relative to the valve seat.

Referring to Fig. 2, it will be noted that the side rods 18 are mountedfor recipro- 95 eating movement in the guides 57, which may readily bedetached for the purpose of inspecting or repairin the pump. ormed onthe lower portion 0 the pum casing are guides 58 for the side rods 59, te latter be- 00 mg employed to actuate the piston 42 of themanually-actuated water ump. he rods 59 are connected at the rig t-handend, and in turn are connected to the lever 60, by means of the link 61.The lever 60 is 105 connected to the lever 36 by means of the link 61.

With pumps em loyed for thin fluids, such as naphtha or erosene, greatdifliculty is experienced in providing a ood packing 110 which willprevent the fluid rom leaking, and yet not offer undue resistance to themovement of the piston. I overcome the objection to the above byutilizing a body of heavy viscous material, such as glycerin,

end is to make it closely hug the piston and revent the fluid fromescaping. Surrounding the end of this packing is a chamber 46, whichbecomes more or less filled with fluid, and whatever fluid is containedin this chamber tends to cause the sleeve to embrace the piston moreclosely. Situated back of the packing is a disk 47 and between the disk47 and the ad ustable nut 48 is a second packing comprising a cylinder49, having a flanged end, which flange engages with the disk 47. Anotherfeature of importance in connection with this packing is the fact thatno matter how hard the nut 48 is screwed into'place, it will not causeundue friction on the piston, and by reason of the peculiar constructionof the end 45 of the packing there is no danger of the fluid escaping.This arrangement is particularly 20 important where the pump is to be inthe hands of relatively unskilled persons. The packings can be made inlarge quantities and sold as supplies, and may be readily inserted inplace by the operator, or otherwise.

I find it desirable to use the same kind of packing for all of the otherpumps. Referring to Fig. 6, the arrangement of the valves will beapparent. 50 represents the cylinder for the piston 16, and 42represents the piston of the manually-actuated water pump 9. Water issupplied to bgth of the pumps from the pipe 37. Formed in the casing ofthe pump is a passage 51, which is provided at its upper end with acheck-valve 52. As the piston 42 is moved back and forth by theoperator, water is received from the pipe 37 and passes through thepassage 51, past the checl -valves 52 and 53, into the delivery pipe 54,the latter being con- 40 nected to the boiler. When the power actuatedpump 18 in operation, water is received from the pipe 37, as before, andon the suction stroke the check-valve 52 is raised, and on the deliverystroke this valve remains closed, while the valve 53 opens and permitsthe water to flow into the pipe 54.

It will be noted that the discharge valve 53 'is common to both thepower and the manually actuated water pumps.

The check-valves employed are of novel form and are shown in Fig. 8. Ihave found which 15 contained in a reservoir 62, and arthat it is amatter of great difficulty to proranging the pump in such a manner thatthe vide check-valves for fluid pumps, parnaphtha or kerosene does notenter the pump ticularly those employed on automobiles. cylinder. Thereservoir 62, Figs. 4, 5 and 55 which will not leak. The water used con-1 T. is provided. with one or more detachable tains more or lessimpurities, and when a E screw-threaded plugs by means of which theforeign substance lodges between the valve 'a reservoir can be filled orinspected. The and its seat, the former will not close, causreservoirshould be nearly fil ed with the ing more or less of a leak, which attimes glycerin or other heavy viscous material an 60 is sufficient tomaterially interfere with the have a capacity equal to about one and oneoperation of the system. I overcome this half times that of thecylinder. On the sucobjection by providing a more or less conical tionstroke of the pump piston the said fluid seat 55, which is arranged toreceive the is drawn into the cylinder 63; this causes the valve 56. Thevalve resembles a tack in suction valve 64 to rise, and the volume of 65formation, in that it has a large head and fluid admitted is dependentupon the area and stroke of the piston. On the forward or deliverystroke of the pump the glycerin is forced back into the chamber, and thenaphtha or kerosene drawn into the reservoir on the suction stroke isforced past the check-valve 65 into the burner. As previously stated,the pumps are preferably tilted downward so that the reservoir 62represents the highest elevation. By using glycerin and arranging theparts as described, the thin fluid em loyed for fuel does not enter thepump cylinder, hence an ordinary soft packing which can be adjusted bythe gland 66 may be used.

The valves which I employ on the fuel pump are also of novelconstruction. I may use the valves previously referred to when theviscous material in the reservoir is of such a nature that it does notaffect the structure of the rubber, but where the contrary is the case Iuse metal balls 65 and conical metal seats. The casing is provided withtwo connecting valve chambers, namely, the suction chamber and dischargechamber, and mounted therein are cylindrical pieces 66, havingcorresponding faces at the top and bottom, and also correspondingconical valve seats to receive the valves. The object in making the endsof these pieces similar is so that they can be reversed in case one sidebecomes worn. This is important where the repair has to be made while onthe road, or by a mechanic more or less unfamiliar with the details ofconstruction. In making the change it is only necessary to remove thegland 67 and the disk 68, a ter which the valve seat may be reversed.Another important advantage in this construction lies in the fact thatthe number of valves in series may be increased by simply extending thecasing forming the support. For example, in Fig. 7 the casing is ]llSlIlong enough to inclose one piece 66, while in Fig. 10 the casing hasbeen increased slightly in length and two pieces 66 are mounted therein.It will be seen that a single retaining means such as a gland 67 isemployed to hold all of the valves in place, and it is obvious that thenumber can be varied at will. This means that only a single joint isemployed in tightening, that the parts are duplicates, and furthermorethat no piping or connections have to be changed. It will be noted thatthe disk 68 is provided with a triangular opening. This opening is ofsuch size and shape that the ball 65 in rising cannot choke the passageof the fluid nor can it be stuck in the 0 en position. In Fig. 10 I haveshown a slight modification of the valve construction in that two valvesare laced in series relation. This is true both of the suction and thedelivery valves. '1 he object in providing such an arrange ment is toinsure the cutting ofi' of the fluid supply at the end of properadmission and each stroke. Where only one ball is employed, there is achance that foreign matter will lodge between the valve and its seat,causing more or less leak, but the chance of both valves being held openat the same time by foreign matter or otherwise is very remote. I haveshown two valves in series, but more can be employed if desired.

Referring to Figs. 3 and 4. the position of the fuel pump with respectto the water pump is clearly shown. The fuel pump is secured to thecasing of the water pump by bolts 70, so that it is always maintained inperfect alinement therewith, yet it can readily be detached if itbecomes necessary to make any repairs. The piston is provided with aprojection or head 29, and secured thereto is a motor or spring 30, theopposite end of the spring being attached to a pr0- jection formed onthe base of the reservoir 62. I use the term motor in connection withthe spring because it is the direct means employed to force the fuelfrom the supply tank to the burner. The rods 18, which are connected tothe power pump piston 16, carry with them a fork or projection 28 whichengages with the head 29 and moves the piston outward to the extreme endof its stroke. When the back pressure on the burner exceeds apredetermined amount, the piston will stand at or near the outer end ofits stroke, and w en it is less the movement thereof will be dependentupon the movements of the fork 28, which is under the direct control ofthe water ressure. lVhen the pressure on the burner ecreases to such anextent that the tension on the spring 30 is suflicient to overcome it,the piston will begin to operate, and its stroke will be dependent uponsaid pressure, the fork 28 carrying it to the outer end of its strokefor each revolution of the eccentric.

'Referring now to the spring-actuated means employed for driving thepumps (Figs. 2, 3 and 11), 21 represents a head which is secured to thetubes 25, the latter being arranged to slide on the rods 27. Extendingfrom the cross-head 21 to the eccentric strap is a rod 75, which forms arigid connection between them. The cross-head 19 is pivotally connectedby rods 27, pivots 26 and rods 18 to the cross-head 17. Between thecross-heads 19 and 21 are a plurality of rubber bufi'ers 22, andsurrounding these buffers in a manner to protect them from dust and dirtis a casing 76. It will be observed that the head 19 is pivotallyconnected to the pump piston, while the head 21 is rigidly connected tothe eccentric strap, and that the only connection between these heads isthrough the medium oi -the rubber buffers 22.

I have discovered that it is necessary to divide this spring into aplurality of sections instead of utilizing a single rubber buffer, oreven two buffers, for the reason that when the rubber is more or lesscompressed it tends to buckle to a greater or less degree and causechafing where it rubs on the rod 7 5. I have further discoveredthatpartitions 77 should be placed between the sections so that they willnot rub upon each other as the eccentric operates the pumps and as theposition of the parts is changed. It is also desirable to "make the boreof the rubber buffers somewhat larger than the diameter of the rod 75,and to rovide the partitions 77 with tapered huh-like projections whichengage with the said rod and move back and forth thereon under changesin pressure on the water side of the system. In dotted lines is shownthe general shape which thebufiers assume'when under more or lesscompression. It will be noted that the material tends to expand bothoutwardly and inwardly, and for that reason the large central boreisnecessary. By making the sections relatively short, I find that thereis a tendency for the rubber to roll on the lates under compression asdistinguished rom the rubbing or frictional contact which exists wherethe parts are made larger. By reason of this construction thelife of theparts is materially increased, and the cost of renewals is small.Reference has been made in this specification to abnormal conditions ofoperation at which time the ratio between water and fuel supplies shouldbe varied. This condition may arise from an one of a number of causes,the principal 0 which I consider to be as follows: Assuming that thesystem is on a vehicle and the latter is brought to a standstill, thewater in the boiler will be converted into steam and may be dischargedwholly or in part therefrom through a suitable relief device. Thepressure in the burner is maintained at a point sufficient to keep theparts hot, consequently the boiler acts as a heat storage device. Whenthe water is again pumped into the boiler, steam is formed owing to theretained heat in the boiler structure, and at this time the fuel supplyshould bear a decreased ratio with respect to the Water normaloperations; The reason for this is ap arent when it is considered thatthe boiler is practically empty and the pump is required to doconsiderable work before steam in any quantity is produced. On the otherhand the burner would be rovided with an excessive amount of fuel i' thefuel pump delivered an amount of fuel in proportion to the water. Again,the vehicle may be in operation and the water supply fail for somereason, such as a broken ipe, a leaking valve, lack of water, etc.Blizperience has demonstrated that if the water supply fails wholl orvirtually and the fuel service is unmodi ed, then flames will shoot overthat required for' out at the rear of the vehicle, or wherever theboiler and burner are located. From the foregoing it. is evident that a.means must be provided to supply water and fuel in definite ratio to theboiler and burner for the usual condition of operation, but when for anyreason the conditions are disturbed, as by reason'of the water supplybeing interrupted wholly or inpart, the pump continuing to operate, thesupply of fuel must be limited to a redetermined maximum. By actuatingthe fiiel and water umps from a common source of power an providingindependent means for regulating the stroke of the fuel pump and acontrollable by-pass, as described, I am enabledto regulate the fuelsupply without danger of overheating ghe boiler or destroying thevehicle body by re. l

The action of my invention is as follows, assuming that the parts areset to maintain a water pressure on the boiler of 450 pounds: When thepressure is less than this amount the pump piston 16 will work at fullstroke, and as the ressure approaches this point the stroke of thepiston will become less and less, until finally it assumes a position ofrest and the stroke of the eccentric is entirely taken up in thecompression spring 22. The spring is compressed on one portion of thestroke and expands or distends on the other ortion of the stroke, hencemore or less of the power which is absorbed in one portion of the strokeis given back to the source of energy on the remaining portion of thestroke. Assuming that the arts are set to give a pressure of 50 poun son the burner, the fork 28 will move in a direction to withdraw the fuelpump piston as it is moved to the right under the action of theeccentric, and if the pressure is less than 50 pounds the motor orspring 30 will force the piston into the cylinder and cause a certainamount of fuel to be delivered to the burner 2. When the pressure on theburner reaches its predetermined maximum the spring 30 will remain inits distended position, and the head 29 will not be affected by themovements of the fork 28, but past as soon as the pressure decreasesbelow 50 pounds the action of the eccentric will again impart motiontothe piston and the motor will cause the pump to act.

From the foregoing it will be seen that I have provided a pum ing systemfor supplying the fuel to the urner and water to a boiler, wherein theregulation proper is under the control of the pressure on the water endof the boiler, yet to a certain extent the supply of fuel to the burnerIS independent, and that this independence of action is automatic. Theordinary operation requires definite quantities of fuel and water, butunder certain abnormal conditions the ratio between the fuel and watersupplies should be altered somewhat by decreasing the amount of fuelsupplied; this last named feature is entirely taken care of by thearrangement of the parts, particularly the fork 29 and the spring 30,and this without thought on the part of the operator.

Those features of the system disclosed but not claimed herein, form thesubjects-matter of my co-pending applications Ser. No. 6806 filedFebruary 28, 1900, and Ser. N 0. 129,859, filed November 3, 1902.

In accordance with the provisions of the patent statutes, I havedescribed the principle of operation of my invention together with theapparatus which I now consider to represent the best embodiment thereof;but I desire to have it understood that the apparatus shown is onlyillustrative, and that the invention can be carried out by other means.

What I claim as new and desire to secure by Letters Patent of the UnitedStates, is

1. The combination of a pump piston and cylinder, a motor having avariable length of stroke for setting the piston in osition for itsworking stroke, and a secon motor for impartin a variable working stroketo the piston o the pum 2. In combination, a driven shaft, a pump, a sring driving connection between the shaft and the pump piston, a secondpump, means moving with the connection for setting the piston of thesecond pump in position for its working stroke, an a motive device forthe second iston.

completing the action of 3. In combination, a pump, a she a drivingconnection between the shaft and the pump piston, a second pump, meansactuated by the shaft for setting the parts of the second pump inosition or its working stroke, and a motor or completing the operationof the second um 4. In com ination, a variable stroke pump, a secondvariable stroke pump, the movable member of which can move independentlyof that of the first pump, a means for partially actuating the secondpump, which means has a variable stroke 1n accordance with thevariations in stroke of the first pump, and a s ring motor forcompleting the stroke of t e second pump.

5. In combination, a pair of pumps, a driving means, a spring connectionbetween one of the pump pistons and the means, a device movingsynchronously with said piston for settin the piston of the second pumpin position for the working stroke, and a spring which forces the pistonof the second pum into its cylinder.

6. In com ination, a piston, a cylinder, a crosshead, guide rods, adriving shaft, a reciprocating means driven by the shaft for setting thepump piston in position for the working stroke, and a separate motivedevice which is set into operative condition by the said means and isarranged to complete the movement of the piston.

7. In combination, a piston and cylinder, a crosshead, means forimparting a reciprocating movement to the head, a second piston andcylinder, a lost-motion connection between the pistons, and a springwhich is placed under stress by the movements of the cross-head and whenunder stress is employed to move the piston of the second pump.

8. In combination, a power water pump, a manually-actuated water pump, adelivery valve which is common to both pumps, a third pump, means foractuating the power pump and setting the third pump in position for itsworking stroke, and a motive device which moves the third pump piston anamount depending upon the pressure in its cylinder.

9. In combination, a piston and cylinder, a driving shaft, a springconnection between the piston and the shaft whereby the piston is givena variable stroke, a reservoir which communicates with the cylinder and,contains a body of viscous fluid which constantly bears upon the end ofthe piston, a fluid tank which communicates with the reservoir, and amotive device which completes the stroke of the piston.

10. In combination, a pair of pumps with an elastic driving device forthe pump plungers, one plun er being loosely attached to the device anthe other plunger unyieldingly attached thereto.

11. In combination, a piston and cylinder, a rod capable of movinglongitudinally, a pump actuated thereby, a device carried by the rodwhich engages with the piston and moves it through a part of its stroke,a driving shaft, a spring connection between the shaft and the rod, anda motor for completing the operation of the piston.

12. In combination, a piston and cylinder, a driving connection for thepiston, a crossh'ead secured to the connection, a second cross-headwhich is guided by the connection, a driving means second cross-head,and an elastic means between the cross-heads which forms a part of thedriving connection and comprises a plurality of elastic buffers.

13. In combination, a piston and cylinder, side rods for driving thepiston, a second pair of side rods which are jointed to the first, across-head for the second pair of rods, a second cross-head which isguided by the second pair of rods, a driving connection connected to thesecond cross-head, and a spring which forms a part of the drivingconnection.

14. In combination, a piston and cylinder, and a valve mechanism mountedin the cylinder comprising two or more valves arranged in series, eachvalve being mounted which is secured to the V in a detachable piecehaving similar seats at both ends. i j

15. In combination, a piston andcylinder, a valve receptacle formed inthe cylinder-f casing, a plurality of detachable valves mounted thereinand arranged in series r'e-t lation, and a single retaining means forholding all of the valvesin places 16. In combination, a valve' chamber,a seat therein, and a valve which comprises a spherical body ofcompressible material and a tack-shaped member of relatively incom.pressible material carried thereby, the head of which prevents the saidbody from: chafing on the valve seat, and the stem of which maintainsthe valve in operativerelation't'o saidseat.

17 In combination, a piston and cylinder, an actuator for the pistom'avalve chamber: extending froma'nd connecting with the cyl inder,reversible pieces in the valve cha nber arranged on opposite sidesoftli'e point of connection between A the cylinder and chamber, andeachfhavi'ng corresponding valve seats in its ends, valves for the seatseach comprisinga metal base and an elastic ball, and adjustableabutments-forregulating the lift of the'valves'. i

18. In combination, a pump, two'motors' which cooperate toiecipr'ocatethe piston of the pump,,elastic means'jntrpo'sed between the piston andoneof'the motors which permits of lost motion between. them, a secondpump, and a lost motion driving connection etween the pump and one ofsaid" motors.

19. In combination, a pump, a motor for moving the piston in onedirection, a tension device for moving the piston in the oppositedirection, and a spring connection between the motor and device whichcomprises a plurality of elastic buffers and separating plates.

20. In combination, a pump, a driving shaft, '21 cross-head which issecured to the pump, a second cross-head which is driven by the shaft, aspring connection between the heads, and a caslng which surrounds theconnection and is movable therewith.

21. The combination of a pump piston, a cylinder, a motor which movesthe piston relative to the cylinder for each operation, a means forvarying the effective stroke of the motor, a second motor which causessaid piston to enter the cylinder by an amount depending upon thepressure within a receptacle, and a receptacle into which the pistondischarges.

22. In combination, a pair of pumps, a driving connection for one of thepumps which has a variable length of stroke,means actuated by thedriving connection for setting the second pump in position for maximumdelivery, and a motor which acts in opposition to said means andefi'ects the delivery stroke of the pump.

23, The combination of a plurality of pumps with a drivin meanscpiniiion to the pumps which inclulesj an ela sticjfinember, and aseparate motive dcificefor the movable element of eachimpwiueuentiptrates t with 'saidf 'neans for ope 'zitiifig-tl'i'e piilnpt,

24. Thecoinbinatioii of :i "ptn r of ptunps, a driving device, anelastic connection between the device? amt-sac pinup which is peiji'nanently' connected to lthe device and said pump a springcoopen'atjngwithsaid device 'lor "operat ng the first ment oned pump,and inea ns which attaches the other umpto said connectiop, I

25. he combination Org pair pumps, ai ;i fitilatinqiitians'cornlntin tothe pumps and permanently connected onepum p, and a mans wh'ichpermitsth'e ti sp anjp to be Wholly or artially idle relatively to theaca n m a fsj 26, he combination ofla'puiii'p, actu ator adaptedlo dhavda varfiztble length of stroke, aaameaas for, causing the aettiator i toimpart a cotresponding stroke to the moy- L able memberof the pump undercei'taincendition s and for permit l 'lg said member. to

be idleavho'lly or partiallyiltvitlij'rspect" t.o"

the schism under some lcbnditio'nsif,

n-able? sfr' k tuato [f r the 11 1 niea its" s'ensitjfveto thepressuregin'; one ,offt pumpsand formin pa' i't of saitlactuatoi" whichgerms the 'eti'ective length of ,its stroke saidpressure, and aconnection be tween the actuator and an'otlier' p ti'nip iticluding anadditional governing means sensitive to the pressure in the lastmentioned pump which governs the length of its stroke.

28. The combination of a pair of pumps, means connecting the two whichpermits one pump to control the action of the other under normalconditions, and means which renders the controlled pump temporarilyindependent of the controlling pump under abnormal conditions, and anactuator for the pumps attached to the first mentioned means.

29. The combination of a variable-stroke motor, a pump, and meansconnecting the pump with the motor which permits the stroke of the pumpto vary independently of that'of the motor.

30. In combination, two variable stroke pumps having oppositely actingpistons, an actuator for the pumps, a device connected to and movingwith the piston of one of the pumps, and a connection between saiddevice and the piston of the other pump which transmits motion from onepiston to the other, said connection including means which permits thedischarge stroke of one pump to control the suction stroke of the otherpump.

31. In combination, two pumps, an actuator for the pumps, a drivingconnection between the actuator and the pumps, means ,Iso,

. means acting on the pumps in 0 sensitive to pump pressure and includedin said connection which varies the stroke of the umps correspondinglyunder certain conditions as to pressure, and a lost motion devicecotiperating with said means to vary said strokes differentially underother conditions.

32. In combination, two pumps, an actuator for the pumps, a drivingconnection between the actuator and the pumps, means sensitive to pumprcssure and included 1n said connection which may vary the strokes ofthe pumps correspondingly within a certain range of pressure on onepump, and a lost motion device cotiperatm with said means to vary saidstrokes iflerentially when the pressure on the other pump tends toexceed a predetermined limit.

33. The combination of a plurality of variable stroke pumps, a commonactuator which moves the movable elements of the pumps in one direction,and separate actuatmg means for each element wh1ch impart motion in theo posits direction.

34. The com ination of two variable stroke pumps, an actuator common tothe pumps for simultaneously causin the discharge stroke of one pump andt e suction stroke of the other pump, and separate osition to theactuator for causing the e ective discharge of one pump to varyindependently of the other.

35. The combination of two variable stroke pumps and their respectivesystems, a device acting on one pump which tends to maintain the pistonthereof within the cylinder, a device acting on the other pump whichtends to maintain the piston with drawn from the cylinder, an actuator,and means loosely connecting the actuator with the first pump andpermanently connecting it with the second pump.

36. The combination of a plurality of pumps, and a driving connectionbetween them, said connection havingprovision in virtue of which onepump may become automatically disconnected under certain conditions.

37. In combination, an engine, a generator for supplying motive fluid tothe engine, a pump for supplying the generator with liquid, said pumphaving a piston, aireciproeating means actuated by the engine for movingthe pump piston outward under certain conditions, a connection betweensaid means and the piston including a lost motion device which becomeseffective under certain pressure conditions, and an elastic devicereceiving energy from the engine which exerts a uniform pressure on thepiston in the other direction.

In witness whereof, I have hereunto set my hand this second da of May,1902.

H RMANN LEMP.

Witnesses:

DUGALD MoK. MoKILLor, JOHN J. WALKER.

